Trying to get recursive parsing working better

app/Main.hs

@@ -69,35 +69,51 @@ parseHeader = do
         text <- munch1 (\x -> x /= '\n') -- Parse until EOL
 --        traceM text
         let allParsedText = readP_to_S parsePara text
+        traceM (show allParsedText)
         let parsedText = fst . last $ allParsedText
         return (Header (length headers) parsedText)
                 
 parseBold :: ReadP MdToken
 parseBold = do
-        _ <- string "__" <|> string "**"
-        text <- munch1 (\x -> x /= '_' && x /= '*') -- Parse until first asterisk/underscore
+        text <- choice[
+                       (between (string "__") (string "__") (munch1 (/= '_'))), 
+                       (between (string "**") (string "**") (munch1 (/= '*')))
+                       ]
+--        text <- munch1 (\x -> x /= '_' && x /= '*') -- Parse until first asterisk/underscore
  --       traceM text
-        _ <- char '_' <|> char '*' -- Throw away the second asterisk/underscore
+        -- _ <- char '_' <|> char '*' -- Throw away the second asterisk/underscore
         let parsedText = fst . last $ readP_to_S parsePara text
         return (Bold parsedText)
 
+parseItalic :: ReadP MdToken
+parseItalic = do
+        text <- choice[
+                       (between (string "_") (string "_") (munch1 (/= '_'))), 
+                       (between (string "*") (string "*") (munch1 (/= '*')))
+                       ]
+        let parsedText = fst . last $ readP_to_S parsePara text
+        return (Italic parsedText)
+
 parseString :: ReadP MdToken
 parseString = do
-         text <- munch1 (\x -> not (elem x "#*_["))
-   --      traceM text
-         return (Unit text)
+         firstChar <- get -- Must parse at least one character here
+         text <- munch (\x -> not (elem x "#*_["))
+         return (Unit (firstChar:text))
+         --return (Unit text)
 
 parseLine :: ReadP MdToken
-parseLine = choice [parseHeader,parseBold,parseString]
+parseLine = choice [parseHeader, parseBold, parseItalic, parseString]
 
 parsePara :: ReadP MdToken
-parsePara =  do
-         parsed <- parseMany parseLine
---         traceM $ show parsed
-         return (Para parsed)
+parsePara = 
+------ parsePara :: ReadP MdToken
+------ parsePara =  do
+------          parsed <- parseMany parseLine
+------ --         traceM $ show parsed
+------          return (Para parsed)
             
 
 main :: IO ()
 main = do
-   let res = readP_to_S parsePara "## Hello **world**"
+   let res = readP_to_S parsePara "## Hello __world_*"
    putStrLn (show res)